I am trying to make a home made Induction heater for a project, but i don't know where to get the power from.

Im pretty familiar with the workings of an induction system, but im struggling to find a way of powering the induction coil. The coil itself if made from 1/2" hollow copper tube, and will be cooled by circulating water pumped round the coil, and the hot water will be cooled by a home made heat sink I have made.

Does anybody know of any websites showing me how to make my own power supply big enough and fast enough to handle this, or a website that will sell me one directly, ready made.